Question

if zeroes of x²-81 are a,b then (a+b)​

Answer 1

Answer:

To get the sum of zeros, we need the zeros. for that we can factorize

so, ( x^2 - 81) = (x - 9) (x+9) =0

= (x-9) =0 or (x+9) =0

so, a = -9 and b = 9

then, (a+b) = +9-9

= 0